Perturbative approach for strong and weakly coupled time-dependent for non-Hermitian quantum systems
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DOI: 10.1088/1402-4896/abe259
Abstract: We propose a perturbative approach to determine the time-dependent Dyson map and the metric operator associated with time-dependent non-Hermitian Hamiltonians. We apply the method to a pair of explicitly time-dependent two dimensional harmonic oscillators that… read more here.
Keywords: time; dependent non; time dependent; non hermitian ... See more keywords
Minimal lensing solutions in the singular perturbative approach.
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DOI: 10.1093/mnras/stad886
Abstract: This paper analyses the properties of minimal solutions for the reconstruction of the lens potential in the singular perturbative approach. These minimal solutions corresponds to an expansion with a minimal degree in Fourier expansion of… read more here.
Keywords: perturbative approach; minimal solutions; analysis; singular perturbative ... See more keywords
Perturbative approach to weakly driven many-particle systems in the presence of approximate conservation laws
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DOI: 10.1103/physrevb.97.024302
Abstract: We develop a Liouville perturbation theory for weakly driven and weakly open quantum systems in situations when the unperturbed system has a number of conservations laws. If the perturbation violates the conservation laws, it drives… read more here.
Keywords: approach weakly; conservation; driven many; conservation laws ... See more keywords